Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- en:materialdaten:rheologische_materialdaten [2025/05/15 15:45] – [Flow behaviour of plastics] cschall
+++ en:materialdaten:rheologische_materialdaten [2025/05/15 15:49] (aktuell) – [Pressure shift factor β] cschall
@@ Zeile 66: / Zeile 66: @@
 The temperature dependence is taken into account by the temperature shift factor $a_T$, which can be described in three different ways
-===Carreau-WLF ((T_B, T_S))===
+===Carreau-WLF (T_B, T_S)===
 \[log(a_T) = \frac {C_1\cdot(T_B-T_S)} {C_2+(T_B-T_S)} - \frac {C_1\cdot(T-T_S)} {C_2+(T-T_S)}\]
-$T_B$, $T_S$ are given, $C_1 = 8,86$, $C_2 = 101,6$
+$T_B$, $T_S$ must be provided, $C_1 = 8,86$, $C_2 = 101,6$
 with: $T_B$ = reference temperature, $T_S$ = standard temperature, $T$ = current temperature
@@ Zeile 78: / Zeile 78: @@
 \[ln(a_T) = - \frac {C_1 \cdot (T-T_B)} {C_2+(T-T_B)}\]
-$C_1$, $C_2$, $T_B$ are given
+$C_1$, $C_2$, $T_B$ must be provided
-**with**: $T_B$ = reference temperature, $T_S$ = standard temperature, $T$ = current temperature
+**with**: $T_B$ = reference temperature, $T$ = current temperature
 === Carreau-Arrhenius (E, T_B) ===
@@ Zeile 86: / Zeile 86: @@
 $$ln(a_T)=\frac{E}{R} (\frac{1}{T}-\frac{1}{T_B}) $$
-**with**: $E$ = activating energy, $R$ = gas constant, $K_{0T}$ = physical size at the temperature $T_0$, $T_0$ = reference temperature (in kelvin)
+**with**: $E$ = activating energy, $R$ = gas constant, $T_B$ = reference temperature (in kelvin), $T$ = current temperature (in kelvin)
-With the Carreau-law the polymer specific material behavior can be described over
-large shear rate and temperature areas.
 ==== Pressure shift factor β ====
@@ Zeile 97: / Zeile 94: @@
 $$ a_p = exp(\beta \cdot (p-p_B))$$
-with the pressure displacement factor $\beta$, the pressure $p$ and the reference pressure $p_B$.
+with the pressure shift factor $\beta$, the pressure $p$ and the reference pressure $p_B$.
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